Jeff Foott / Bear Grass (Xerophyllum tenax) flowering, Mount Reynolds, Glacier National Park, Montana

Jack Dykinga / Yellow California goldfields (Lasthenia californica) and orange California poppies (Eschscholzia californica) carpet the hillside, with flowering Joshua Tree (Yucca brevifolia) in the forground. Antel...

Jack Dykinga / Yellow California goldfields (Lasthenia californica) and orange California Poppies (Eschscholzia californica), with a flowering Joshua tree (Yucca brevifolia). Antelope Butte, near the Antelope Valley...

Jack Dykinga / Yellow California goldfields (Lasthenia californica) and orange California Poppies (Eschscholzia californica), with a flowering Joshua tree (Yucca brevifolia). Antelope Butte, near the Antelope Valley...

Jeff Foott / Joshua Tree (Yucca brevifolia) group in desert, Virgin Mountains, Gold Butte National Monument, Nevada

Yva Momatiuk & John Eastcott / Joshua Tree (Yucca brevifolia) group, Joshua Tree National Park, California

Jack Dykinga / Yuccas (Yucca elata) silhouetted against the moon and morning light, White Sands National Park, New Mexico. January.

Jack Dykinga / White Sands National Park with its white gypsum dunes dotted with Yuccas (Yucca elata) creating patterns amid the dunes, at sunset. White Sands, New Mexico. January 2013

Jack Dykinga / White Sands National Park with its white gypsum dunes dotted with Yuccas (Yucca elata) creating patterns amid the dunes. White Sands, New Mexico, USA. January 2013

Inaki Relanzon,Inaki Relanzon / Joshua tree (Yucca brevifolia) at night, Joshua Tree National Park, California, USA, June 2012.

Floris van Breugel / Joshua Trees (Yucca brevifolia) in Antelope Valley against the night sky illuminated by the orange glow from Los Angeles light pollution, California, USA. September 2009.

Jack Dykinga / Silhouettte of Joshua tree (Yucca brevifolia) at sunset with lightning in background, Sonoran / Mojave transition zone, Joshua Forest Parkway, Arizona, USA